题目内容

混凝土的拌制通常以机械为主，人工为辅。

A. 对
B. 错

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If one always _______ one’s mind, he succeeds in nothing.

A. take
B. make
C. change
D. move

混凝土养护分为自然养护和蒸汽养护。

A. 对
B. 错

The teacher was very angry when he was ______ that the student had been cheating.

A. of
B. out
C. to
D. in

千斤顶与压力表需要配套校验。

A. 对
B. 错